It means absolutely nothing. Ryzens for example all have high idle power (20 to 30 W) due to the IOD, and it still means nothing. Desktop cooling is more than enough to continuously manage that without soaking, and power supply efficiency concerns make it so it doesn't matter whether you are drawing 10 or 50 W, if anything being a slightly higher draw tends to help the efficiency curve, unless you have a Titanium unit that is 90% efficient at 10% load.
That said... the Ultra 5 245K would be a sidegrade at best and require a platform replacement, you should look at buying a Core i7 14700K instead.
I get that idle means nothing still annoying when now writing something, reading office work and a pc consumes on idle already 20watts more.
Ok see following two attachments, why is the 245k ranked so high in top passmark gaming score?
Why the 14700K and not the 14900KS?
I would perform such upgrade only for a slight improvement of system response and in gaming performance where cpu heavy tasks are needed.
Why you argue a 245 k would be a sidegrade at best as at first attachment it has 20% better score as a 12700K.
Please come with data that is backed up
Besides that lets say i would buy a 14700k now, are the now completely free from degredation issues?