That is very true, but you can switch latency and ping in the settings and can check it ingame.
Lag spikes are obvious and easy to spot. Lag in general is easy to feel.
I played with dogshit connections for years so I can notice lag easily from my games and perspective.
Don't get me wrong I'm not saying every match and gunfight is rigged.
I am aware that there are thousands of players more skilled than myself.
Sometimes I get outplayed etc.
Ever since MW19 I don't trust Activision.
Sometimes you can destroy a lobby and other times you can barely get a shot off and get annihilated.
Again skill and consistency play a part, but the Sbmm takes over since the last few years.
It helps you and throws you a bone sometimes, but punishes you for doing well and it's very apparent there is all sorts of manipulation going on.
Remember Cod4-BO2 days?
If you were choosen as host you had a clear advantage. You can easily notice it and know what to look for.
It's no different from that.