It may be naive, but I tend to assume the manager is playing the players he believes give him the best chance of winning. Don't think Conte is trying to get sacked.So he plays Royal!
I'm am sure Conte wants a better RB/RWB than Royal...but it's pretty clear in his opinion Emerson is the best he has at the moment. At the very least, it's clear he feels Royal gives the squad a better chance of winning than Spence.