Pensioners aren't downsizing because it costs a lot to do so (stamp duty, legal cost, moving cost) NOT because they get a £200 a year winter fuel allowance. - hardly one of the 'main' incentives as you put it.
yes, obviously the bedroom tax doesn't apply to home owners.
I didn't say the WFA is the main incentive, I said that one of the main incentives for downsizing is the cost of maintaining a larger than needed dwelling, and some of that is heating. This is part of it.
There are many calls to eliminate stamp duty too as you are correct that that is one of the main barriers to moving. Stamp duty has completely outlived it's purpose. When it was first designed it was there to ensnare expensive homes. Now absolutely nothing in London is exempt from it.
When you say "pensioner bashing", I don't really get what you mean. Pensioners get massive exemptions from costs that others pay. That's not bashing, but just fact.