That's utterly ridiculous, for many reasons.
In Peace Walker all you had to do was send soldiers out, set your R&D and then do a side opp and everything comes back all finished. It was grindy, but it was grindy due to rather poor design and what the game was, a pocket version of MGS, it wasn't designed with microtransactions, TPP is considering we have locked out menus in the 15 hour playthroughs.
My argument is valid because we have years and years of full price games being packed in with microtransactions with gridny as fuck mechanics to entice players to spend real money to save their time. Publishers don't force microtransactions in games without reasons to have players spend their real money on them, they force design around them and we already have proof that if you want to speed up time in some way in MB you must be connected online and it's going to require some type of transaction.
It's a chain reaction, this isn't some cosmetic shit, Konami is ditching console games and going to mobile, is it really shocking they are milking the last MGS game for all it's worth with their new profit system?
Blindly claiming ignorance isn't an argument, so stop doing it when other people bring up completely valid points on the past five years of AAA gaming and mobile profit mechanics being slipped into it. Just remember what Ubisoft said, "We need to make the $60 customer into a $200 customer".