Sure, it's not unusual that $100 minimum tables would be heavily watched. My way of playing those games is not to have a big bet spread. I can't think of a bigger red flag than having a 1-10+ spread of black in a high limit pit where the good games are located. I confirmed with CVCX that my lower bet spread and exit strategy is profitable.
I was commenting on my observations about Covid. In my opinion, the $100 tables appeared less heavily watched pre-Covid. Post-Covid, many casinos now have a pit boss watch every hand and also appear to have surveillance watching. That is why I think it is nearly impossible to play those games with the degree of longevity that existed pre-Covid. I didn't get backed off pre-Covid, but did twice after Covid. In my opinion, the two back offs were related to me logging about 20 hours of play spread out over time and being profitable. In one case, the casino told me a business decision was made that they didn't want me to play (and, interestingly, it was unique to that casino and not the other ones in the chain.)
Mid-week, most of the high limit pits are empty, so it appears that it makes it even more likely to be watched. Although the high limit games in Vegas are theoretically attractive, they aren't really playable as a practical matter.