Nobody is suggesting you panic. Staying home is not panicking. Practicing standard virus safety is not panicking. The parent post is not panicking, nor have they said anything that implies they need to "relax". You're attacking people and concepts for shallow reasons.

I have the virus, and I'm young and healthy so I'll be fine. But I've been quarantining myself to protect people more vulnerable than me.

But hey, you're right! I'm fine, you're fine, let's all relax. I guess I'll go watch a football game, stop by a McDonald's, catch the subway back and maybe drop by an old folks home on the way just to volunteer and help the elderly. No need to panic. Business as usual right? Wouldn't want to miss that flight to tomorrow's trade show.

Yes, if I get the virus, I'll quarantine. But I don't have it! So I'm not going to freak out prematurely. This is the recommendation, no?

This sentence is reasonable. Your earlier "if I get it so what?" Implying you don't care about others around you if you do catch it is what's not reasonable.

Certainly the recommendation is not "freak out prematurely" so yes, you're doing a good job. Practice good hygiene, practice social distancing measures. Make sure you have the supplies you need for a successful quarantine. I'm glad I did.

Going by the greyed out comments, you could argue that they're already practicing good social distancing measures.

You won't know you have the virus until the symptoms hit you in a few weeks after infection, and that can only be confirmed after a test.

In that "incubation period" one can spread the virus

Main point: you have no frigging clue in the world if you have it.