This is not correct. All core developers are focused on payments. If there is a narrative out there that "Bitcoin Core supports inscriptions and Knots doesn't" that is wildly disingenuous. The most important mistake specifically in your post is that looser op return limits mean there will be more inscriptions on chain. Inscriptions are very happy living in witness data already where they have been for years. It is much cheaper to store data there. The goal of the v30 policy change is to match the behavior we *already observe* in miners, the consensus engine. This improves block propagation, fee estimation, and reduces the advantage larger miners have over smaller miners. In a word: decentralization. Here's some more posts:

Delving Bitcoin

Addressing community concerns and objections regarding my recent proposal to relax Bitcoin Core's standardness limits on OP_RETURN outputs

Hi everyone. I recently proposed that Bitcoin Core lifts its standardness limits on OP_RETURN outputs. The reason is that they are not binding any...

Delving Bitcoin

A Comprehensive OP_RETURN Limits Q&A Resource to Combat Misinformation

My goal is to share a consolidated list of questions about OP_RETURN limits that we’ve answered on Stacker News, as the original thread has becom...