In a good game anything the game lets you do is built into the math of the game. Therefore either D&D 5th and One D&D are not good games OR the players are supposed to spam Guidance on every single roll they can and it is already built into the math.I don't agree that any large majority of players is going to "naturally" do anything that impedes the flow of the game. Do your players constantly use Help actions and guidance at each and every skill check at your table, or do they trot those out for only very critical checks that carry significant weight?
Thus we can logically conclude that, in One D&D, players are meant to spam for Inspiration constantly, almost always have Inspiration, and then apply it to every roll that matters. Thus, when One D&D players loose their Inspiration every morning, they are supposed to immediately start doing trivial things, pressure the DM into leting them roll for them, and all gain Inspiration as soon as they can every morning. One possible way that they could do this, if their DM says No to their rolling for trivial skill checks, is by attacking and killing random Commoners. Doing the math if four PC's each murder 50 Commoners every morning, using attack rolls to do so, then they are almost sure to have each rolled a 20 during the process, gaining Inspiration. Then they just kill the big bad (the other big bad, now that they are all serial mass killers) that same day, spening their Inspiration to make it easier.
Or they could just be an all-human party, but that will never happen....