The issue with this line of thinking is that you just dont know how the information will be used against you. Maybe today you have nothing to hide, but that information is out there forever. Insurance carriers may refuse to fund your medical treatment because of some shit you said online, or a job may refuse to hire you. Or, if Im really putting on a tinfoil hat here, a radical government (or political faction in general) may use the information to target you. It may not even be accurate info, but the fact remains that info you leak online is stored and could be leveraged against you, your friends, or your family, at any point in the future.

Maybe itll never happen, but maybe it will. Its just better to try to keep your data private where you can. Apathy is definitely one way to live, but you should consider putting in even a little effort to just use a more secure browser. Its not really that hard lol