Indeed some glaciers are growing and gaining mass due to increased precipitation (in part due to climate change and enhanced atmospheric water content). But that's the case only for glacier in very cold places, like East Antarctica that is growing, perhaps at an increasing rate ([1][1],[2][2]). But unfortunately West Antarctica is pretty much a desert, the total precipitation is in average less than the Sahara desert. That is usually the case in very cold places. The capacity of air to hold dissolved water decreases exponentially at lower temperatures. Therefore, cold glaciers (the ones that are most often growing), account for a small amount of the total global ice mass change.

In contrast, temperate glaciers (i.e. Not so cold), constitute the majority of the most well known mountain glaciers (outside Antarctica and the high arctic). These, are also in many cases receiving more precipitation, but the increases in accumulation are in most cases offset by the increase in temperature that have a double impact:

 1. More melting due to higher temperatures
 2. A larger  fraction of the precipitation falls as rain instead of snow, therefore promoting melting instead of accumulation.

And the more a glacier melt the lower its surface will be, therefore it will be exposed to even higher temperatures leading to further melting.

As a last point, glaciers grow due to snow accumulation. It is unclear to me if that's what you meant by "moisture condenses at mountain tops".

Finally, it is needed to point that glaciers have been receding since last ice age about 15,000 years ago. Recent warming have just accelerated the process a bit, but they were out of balance and shrinking way before the industrial revolution.

  [1]: http://onlinelibrary.wiley.com/doi/10.1002/2017GL072937/full
  [2]: https://phys.org/news/2017-05-growth-east-antarctic-ice-sheet.html