This is not about pulling existing games. I'm not sure why you are reading "Zenimax games" as preexisting bethesda games but you only need to look at the argument being made to realise this isn't what they are talking about. Pulling old games isn't even "implausible" due to profitability at all especially when referring to "the life cycle of the newly released console generation".
The person who contacted the EU regulators (who he calls watchdogs) on behalf of that site seems confused about "the lie". The EU came to the conclusion that the games Zenimax had did not pose an input foreclosure risk and made no concessions for Zenimax games (future and present). It means that MS had the right to not make Zenimax games (future or present) available on PS5 outside of existing contracts. This doesn't mean that there wasn't "a lie" by the notifying party that such a scenario was implausible when it wasn't.
Current games and existing contract games are up for sale, and cant be pulled down from other stores.
Future games are case by case, which is covered by 108 and 109. If they are approved for other stores, 107 would be applied here. If not, 107 would not be applied.
For example, IF MS sees that ES6 cant hit the target for new userbase, and decided to put the game on PS, it has to be the same version as Xbox version. MS cant give PS a degraded content, as that violates the agreement rule with EU.
MS isnt lying here. They are doing what they agreed with EU.