That's valid, I'm sure I've done the same more times than I know. My general rule is if it's from a brand or site I know I've interacted with or generally recognize I'll spend two seconds to check the unsub options.

If the unsub requires me to log in first, I mark it spam instead. If the link looks fishy and/or I can't readily discern it's of any quality it's spam. If I have no clue why I could've gotten the message it gets flagged for sure.

Luckily for me I get very few emails per month that I don't know why I would've gotten them, so it isn't a painful exercise to give them a chance to not get flagged.

I use Unroll.me[0] to manage the messages I do want to get, but want to check on my own time and I don't want them sitting in my inbox. I'm sure there are other types of services, but I'm generally happy with what they do. They also can manage a lot of the opt-out features as well, not sure if it 'protects' me any more than doing it myself though.

[0] https://unroll.me