On driving lights, doesn't matter. If someone is distracted while driving, just because you add a few lights I don't think it would make any significant difference. For example, in my younger days I was more of an adrenaline junkie than a cruiser when it came to motorcycles and rode one of those fancy crotch rockets the old timers hate so much. I'd heard the same old timers mention how people don't see motorcycles of course and didn't believe it. Well not long after I got my license and a ton of close calls with other traffic (including 1 wreck) I went from offensive to defensive, especially at night time. It was so much worse at night time and it was BAD during the day. I started off upgrading lights to LEDs, to try and make the bike brighter. Then ended up covering the whole bike in underglow to make it stand out even more. Never made a difference. You can have bright flashing lights and a billboard on your back saying "I'M HERE!", but if someone on their phone texting, dropped something on the floor, or just plain zoned out; it's a waste of time.
As far as seatbelts are concerned I have experience in that department. My dad was a firefighter and brought up the subject a few times how it seemed to be 50/50 in a wreck bad enough where a seat belt would save a life. My cousin was sitting in the back seat of a brand new Lexus SUV a few years ago when it was in a wreck. Not too terrible, a driver hit the side going roughly 30mph. Lexus of course had a 5 star safety rating. The seat belt caused internal bleeding after the accident. Several organs hurt pretty good and a ruptured spleen. He was in the hospital for over a month and spent the next year in and out of it. Unfortunately he will never be the same.
The thing about government regulations is, they don't tend to be effective. Because when it comes to the vast majority of the laws they pass, it does nothing to solve the cause of a problem, but to reduce the effects or damages that problem has on the back end. People in power tend not to be very smart, so when you have a complicated issue with a cause that cannot properly be addressed they pass rules and regulations just to make themselves feel better. Usually without even educating themselves on the topic which they are trying to regulate. It's the same across many industries; from energy generation, automotive safety, gun laws, healthcare, or otherwise.
Speaking of energy generation, just look at their regulations there. Politicians decided that we needed cleaner more environmentally friendly energy generation. So they decided we need windmills. Winds free, doesn't burn anything, its clean. Except they destroy local bird populations. Due to unreliable power generation you still have to have the old methods of generation to make up for calm days. The construction and transport of all the parts, and replacement parts like the blades that require constant replacement kinda negates the whole point of reduced emissions. Then the giant landfills that we have to bury the old blades in...
If government regulations were actually well thought out and researched, targeting the cause of an issue in the country rather than targeting the effects of the issue we'd live in a completely different world. We'd likely be using entirely nuclear power, health insurance companies would be out of business, mental help institutions would be built, cars would likely be more designed like race cars for safety, taxes would probably be considerably reduced...
