Because this is supposed to be a team based game as well as individual. The developers need to bring in a incentive for team members to come to the defence of fellow players when they are attacked. Currently you get a crappy shrine dragon and rss. You get sweet f all in atlas if you help out team mates. Maybe getting glory or gold would be an enticement. Just my thoughts
If u defend ur teammate and ur teammate defend u u can stop or at least make atacker use 2 or 3 dragons , (depend who and what lvl atacking u and ur base setup etc) with this u can reduce ur or ur teammate loss . Granting u more glory and more troops revive … just my thought
Sounds super easy to exploit though? If you gain too much?
Having some percentage of hammers returned based on how successful the defense wouldn’t kill this game.