I was surprised by both as well. I suppose part of Ayuso's low odds are he will be Trek's sole leader for the Tour (Skjelmose is 150 to 1) is young and appears to be improving? whereas Almedia, Lipowitz and Del Toro most likely won't have leadership on their respective teams?
On the other hand, it appears the general public either thinks Roglic is washed, isn't motivated, is too injury prone, or is third on his teams priorities and likely will be stage hunting only. At some books, Roglic's odds are as low as 50 to 1, but the odds I posted were the best odds (as that is what someone would bet) that I could find.
Here is the link to the odds I used.
https://www.oddschecker.com/cycling/tour-de-france/winner