Why?
Well, you gave reasons yourself already:
If even small papers pick on the IOC contracts and all kinds of negative impacts, then why should anyone be surprised that the public opinion at least in several pluralist societies in Western Europe is not embracing the idea of hosting the Games with open arms anymore.
You may call it double-standards by the media, probably true. But at the same time, if people aren't convinced it's the right thing to do, they won't be convinced by a media campaign trying to promote a bid. The concerns raised by anti-bid organisations in various cities should be taken more seriously by the IOC and not just brushed aside as in the past.
Also, as I said before, it's not an immediate problem with Oslo in the mix, but should Munich say NO, there will probably not be a German WOG bid again for a long time to come, if ever. This would remove Germany from a not-too-long list of potential WOG hosts. Switzerland seems to have removed itself already too, judging by the Bern and Graubünden referendum losses in recent campaigns, and Austria doesn't seem keen either anymore after Salzburg's defeats. The refusal of a 2028 bid in a Vienna referendum recently may not be directly related to WOGs, but must be an indicator about the overall mood in Austria.
For Europe, this leaves the ones we now have in the running like Krakow and Lviv, both at least for now with high risks, then Scandinavia (aka Norway, plus Sweden if the Are/Stockholm distance is ignored), some French or Italian cities which might have a go if their country's SOG bid attempts fail - or even daydreaming Barcelona. Not to mention the Balkans which really should have other, political and/or economical worries than Olympic bids. And not to forget that the Oslo referendum was also for a long time looking like a NO, which could have made the 2022 race even more of a choice between the least of evils than was the 2020 race.
If the IOC can live with such a future selection of hosts, fine, but I think they would really love more "safe" options, especially from the Alps in coming bid cycles. So there might well be people in Lausanne lighting candles every day for a Munich YES, if only to make it a real competition and not just Oslo vs the rest. Would also not exactly be a thrilling prospect for Thomas Bach to have an anti-Olympics result in his home country just a few weeks into his reign.