Hi ivsem

How easy depends on the difficulty really and not how much energy you spend to get it.
What matters is how much energy is used to process a pack of txs.
Once a coin gets old enough, miners will get their reward mostly via tx fees, so there will be a barrier for low tx fees, because miners need to pay electricity. Therefore people sending coins will pay for that electricity indirectly as fees. So, yes there is a point in having such a coin: waste less energy to produce the same result and enable cheaper txs (all this enabled by a traditional PoW based consensus).