Choosing only three platforms to analyze an entire travel market is like judging Italian cuisine by tasting only pesto pasta: you get an overview, yes, but it's far from a comprehensive analysis.
To truly understand what's happening, more than a limited sample is needed, especially when looking for opportunities or wanting to grasp the user autonomy in such varied contexts.
Imagine I had to make a menu for an entire month based on only three ingredients, it would be a culinary disaster and the same principle applies here: the richness of the offer is ignored.