On the Origin of Thermal Waters

The origin of thermal waters is a topic of debate among specialists, no less than that of carbonic waters. At the same time, we will set aside cases like Yangang-Tau and, probably, Tashkumyr — here we have burning material, heat being released, and strict contours of the oxidation zone (after all, combustion is a relatively rapid oxidation) in a confined space, although even here, to be honest, there is no complete consensus among professionals. For the explanation of most other cases of thermal water formation, both in Kyrgyzstan and many other places, two approaches are most often applied: either hot waters are considered infiltrating and heating up as they move from the recharge area to the discharge point, surfacing, or they are considered juvenile (first entering the surface water cycle) and then cooling as they move toward the discharge zone.
But there is another important question of a global nature, the solution of which is related to the problem of the genesis of thermal waters. It has been reliably established that the planet Earth disperses a portion of the water vapor that enters the atmosphere into outer space. If these losses are not replenished (and the only source of replenishment can be only juvenile waters), then in the long term, Earth is geologically facing dehydration. But perhaps the discharge of juvenile waters significantly exceeds the planet's losses, and then geologically soon its entire surface will turn into a single ocean?
Or maybe, in nature, the formation of thermal waters is possible not only through the paths we have considered, but also through others that we are currently overlooking without thinking?
Agree, the questions posed require answers, not immediate ones, of course, but sufficiently precise.