The problem is that there are people with pre-existing conditions who have issues.
I personally had a headache and no fever for two days, then lost taste and smell for over 2 weeks, and now it's slowly coming back but with weird issues (like when I ordered McDonald's for my daughters and the food smelled like rotten tomatoes when it was just fries and nuggets, or fresh corn tasting like mildew when everyone else said it was delicious). I also find myself getting winded easily and had a bit of pain like what you describe.
My nephew got it and never had any symptoms but had a positive test. That's the common situation.
Then there's my friend Katherine, who got it in the Spring and had a terrible fever and chills, and then was getting better and one day had sudden breathing problems. She called 911 but by the time the ambulance arrived she was dead. She was 43. She had some underlying chronic health issues, but still...I would never have thought she was that at risk.
The smart thing to do would have been to have the elderly and vulnerable quarantine while the rest of us got herd immunity and the thing ran its course. Even if the immunity goes away it would have ended a long time ago and we could get a vaccine on a less rushed schedule.
ἡ δὲ κἀκ τριῶν τρυπημάτων ἐργαζομένη ἐνεκάλει τῇ φύσει, δυσφορουμένη, ὅτι δὴ μὴ καὶ τοὺς τιτθοὺς αὐτῇ εὐρύτερον ἢ νῦν εἰσι τρυπώη, ὅπως καὶ ἄλλην ἐνταῦθα μίξιν ἐπιτεχνᾶσθαι δυνατὴ εἴη. – Procopius
Ummaka qinnassa nīk!
*MySmiley*