The concept of pool is originally against Satoshi's idea of decentralization.
It most certainly is not. Satoshi himself realized that mining would become an industrial-scaled operation.
Pool owners did it for sheer profit and u find that OK.
Pool owners realized they could combine many miners together and have a better chance of solving blocks, which in turn meant more profit for the miners. Some of those owners charged fees for the privilege of mining on the pool. Others did not, but found other ways to obtain coin such as donations and merge mining.
U say ASIC miner manufacturers are mining themselves is a Capitalist feature.
Just like the guys who initially wrote the pool software and gathered together people combining their hashing power towards solving blocks, the ASIC manufacturers take that a step further. They produce the chips, put together the hardware and mine with it, and/or sell it, and/or provide cloud mining services. Why would the guy who invented the shovel not be allowed to use it to dig for gold as well as sell the shovel to others?
And when someone perform block withholding attack... u find it stealing ?
Absolutely. Those who perform block withholding attacks have changed the software to give themselves an unfair advantage. They are purposefully withholding a solution, and if the OP is to be believed are somehow transferring that solution somewhere else to give themselves a larger portion of the pie than they deserve for the work that was done there. It's like hacking your ATM card to be able to withdraw money, yet not have that withdrawal reflected in your bank's balance. It's theft, plain and simple.
Wake up buddy. Block withholding practice is now spreading among miners like wildfire. There is a good side of it. People will lose faith on pools with time and the mining will be de-centralized again. Be dynamic. Accept the change.
Seriously? You really think that the thieves should get away with it because that will somehow breakdown the pools and magically spread the mining back to the masses? Yikes.