Cranky nerd here. I've tried to use Tor to access websites for legitimate purposes and found much of the web has become unusable recently.
But perhaps you need a motivating example, since you don't think there's any value in supporting Tor! I'll give you some.
- Security researcher wishes to contact an organization about a security hole in their site or product, but doesn't know if they'll be sued, so they want to protect their identity. (source: this is me; have met other people doing this)
- Pedophile (who doesn't want to be one) seeking therapy options that don't involve a high risk of being incarcerated or killed. (source: read an article about this)
- Teenager in a repressive environment trying to access LGBTQ resources; parents have a netfilter on, or maybe have snoopware on the router. (source: several acquaintances)
- Chinese citizen trying to find a different view of history (source: pretty freaking common, although Great Firewall makes it tricky)
These are people who don't have other, good options. And you'll need to be able to withstand the sizeable quantities of malicious traffic that don't come through Tor, so it's not like you really win anything. It's worth not blocking Tor.