Your point seems very close to, if not outright, suggesting that the team should have possibly reached for (your) perceived needs hoping for one of the small percentage of immediate rookie impacts while possibly ignoring their draft board in what many considered a weaker draft class.
Reading through some of the responses there seems to be a total disregard to how stacked the roster is/was and/or how McVay felt about the players already on the team. Meaning there's a good chance that anyone selected would have issues immediately contributing on this veteran clad team anyway. With this, we can't mistake someone contributing elsewhere as to mean that they would have gotten a similiar immediate opportunity/results with the Rams in 2026. Just as both Simpson and Klare may very well have been provided opportunities and be contributing in the league today if selected by other teams.
The key is somehow being able to predict injuries.
Yes. Davante is getting older and had an issue last year. But he isn't alone. The original plan seemed to go hard on the 13 personnel grouping and Tyler Higbee had missed a total of 21 games the prior 2 seasons. And Matthew Stafford, playing the most important position, is 38 and there were concerns whether or not he'd even be able to play last year due to his back.
Oh well. Sure the team could have gambled with the short-sighted approach you suggest for 2026. And maybe there were similarly graded players on their draft board with at the 13th & 61st overall selections at the positions you prefer. But, it's tickles me that this isn't even a conversation if not for a bad call vs. Wallace in Denver and a missed FG vs. the Bills.