Do consider factors like transferring ETH to exchanges then exchanging it to BTC then to FLUX, if mining ETH just to swap for FLUX. On top of that, if you are mining with 3080s or 3090s then you probably would have to mod your GPU to keep that hot GDDR6X cool, which again costs €70+ and additional time.
The OP asked for experimental mining, not trading/swapping so suggested to check out FLUX which is on Equihash 125,4 algo and I think the project is going strong. I only have 3080s and 3090s, so I am not so sold on making so much effort to mine ETH, its just too much work with some risk, if modding not done well. However, I do have my MSI Suprim 3080 and 3090 pointed to ETH, as they are so good at handling GDDR6X temps and electricity bill needs to paid, and others to FLUX, because supporting network by mining it is also important for the betterment of a project.
There is nothing about sense or no sense imho, it depends what you prefer and your target is. Some people just mine for fun, some people are addicted to hardware and just buys hardware to mine different coins with them, just to play around. I was one of them in my initial crypto days. There are different people with different goal in crypto space. Everyone has their own preference, so I leave it upto people to decide what makes sense to them and what not. I just put up my opinion.
And yes, I agree with you, if profit at today's price is the only target then there is no doubt ETH is what you should mine. But if you want to explore around then its better to look around with other factors open.
Have fun with mining and enjoy the ride! Good luck
PS: Their (FLUX) miners reward programme https://fluxofficial.medium.com/flux-team-announces-miner-rewards-program-release-date-bad8b03067e3