I know a company where engineers publicly set their own twice-yearly objectives, which are then linked to their bonuses. You can imagine a number of advantages to this system from the perspective of someone trying to optimize a firm: high performers will set difficult goals, sandbaggers will set easy goals that look difficult. Telling the difference is still hard because often only an already-expert person can estimate a problem's difficulty, but at least the loop gets closed in theory.
If the companies you work for never catch you sandbagging, then you're good .. until they go out of business because of all the other dead weight they're carrying and you find the remaining firms use technologies that require you to re-adapt your sandbagging strategy. The firms hope that this adaptation itself will refresh your motivation for a decent percentage of your vest period (since you're one step closer to being truly obsoleted and need to build resume points). Anyone who stays past their vest period can assumed to be a sandbagger, so 2-5 years looks good.
Yeah basically you're fine for now; just remember that this business will kick you out on your ear eventually if you don't keep up. This can happen real fast sometimes. If you don't use some of your fallow time to do continuous learning, you might slip out of your salary range or out of employability entirely-- that's the tail risk you're taking.
Maybe that's why you feel some anxiety: you have a fat-tailed existential risk that hasn't triggered yet. You should feel anxious, it totally can and will trigger eventually.