Giving advice is a very human trait, but taking it isn't. It's probably a lot easier for him to spot those opportunities from afar, besides Thomas is a notoriously cautious rider within the bunch when it comes to time gains. Based on the body of work we have available to us, we can surmise that he may have managed the game better had he been in del Toro's shoes, but he'd never have even considered taking the risk had he been in Yates' ones.G. Thomas lost the 2023 Giro by not attacking Roglic when it was clear he was struggling.
In fact, the day Rogic lost time, it was because Almeida attacked. If it were up to G., Roglic wouldn't even lose time that day.