In Ireland (and I'd guess in most of Europe) bogs are are artificial landscapes, the result of mass deforestation and overgrazing. I don't see them as warranting any particular preservation. At least in the case of Ireland peatland preservation is just trying to preserve a very particular artefact of the agricultural revolution. Maybe it's different elsewhere... . It's about as worthy a cause to me as a golf-course preservation movement would be (ignoring the carbon-sequesterisation aspect of the argument, which I don't feel like assessing right now).

In the UK there's an lot amount of wildlife 'preservation' effort + money spent on on 'preserving' the landscape as an 18th century agricultural-industry idyll (including making sure that the actually indigenous flora+fauna doesn't get out of hand) rather than actually returning it to a more sustainable wilderness. George Monbiot has a big bit on this with his re-wilding schtick - https://www.monbiot.com/2013/05/27/a-manifesto-for-rewilding... .