This is one example that I think makes sense. Different states have different fire risks and other reasons to prohibit or permit fireworks. Also, fireworks don’t tend to be an essential or regular part of people’s lives. Abortion is essential healthcare. Marijuana is a daily or frequent part of many users lives (and essential for some medicinal users).
Things like this, marriage equality, slavery, prohibition, voting rights, etc. function better when regulated at a federal level.