It's a trendy peleton. If Peter, or Chris, or Nairo, or Alejandro do something out of the norm (for whatever reason), there will be those who emulate them.
Maybe a boycott of the glove sponsor???
They also have a team car with spares if the gloves become too waterlogged or too muddy to be helpful.
Disclaimer: I haven't fact checked the initial assertion to know if it is a trend or just a few random pics selected.
Final thought = well maybe not Chris, not one to be emulating presently.
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Vintage, modern, e-road. It is a big cycling universe.