I see the argument. And it may be that ‘tax avoidance’ on those charts plays a minor part. Or it might not. Dunno.
But it must be wrong to object to people lawfully avoiding tax. Tax incentives are used all over the place by government to promote policies and change behaviour. If people take advantage of those incentives, that can’t be open to criticism. There is no ‘proper’ level of tax. There’s just a level set in law, and constantly varied, by government.