That there is zero overlap now does not mean it will stay that way, as Apple demonstrated so well.
So... how would hurting RISC-V, which helps ARM, be good for Intel? It's not. Pick a different boogeyman basically, Intel isn't the one here.
If ARM can scale up from cortex m-series to Apple M3 Pro Ultra Max… then why couldn’t RISC-V?
In point of fact, and I'll just say it again: this is dumb. Intel isn't remotely the most likely candidate here (again, my read is that on balance they'd love to see ARM competitors get some pressure on the other side). Trying to claim otherwise is just engaging in platform flamery nonsense. The logic doesn't work.
For Intel to ignore RISC-V right now would be to completely neglect the lessons of Apple Silicon. They appear to have waited until there was an actual product taking their market share before taking ARM seriously. I expect them to learn from that and not wait for a product this time.
Given the years of engineering effort involved in getting any of these projects to release, this definitely looks like an industry shift, not something driven by Apple.
Perhaps Intel's thinking here is that competition with ARM will drive innovation and cost-downs in that space, which will bleed 'up' and make their own competition's (mostly ARM) products even more competitive.
Multiple companies have M1-class RISC-V in the pipeline.