I feel the same way about smartphones not including chargers. The third-party charger that I already have is likely better than whatever charger comes with the phone, so the one that comes with the phone will just go unused. I understand that manufacturers are not going to “pass the savings onto the consumer” when they don’t include a charger, but at least it doesn’t feel like e-waste. I felt the same way about the headphones that would come with devices for a while. Just a waste that I will never use.

On the other hand, having a stock charger could aid in troubleshooting by offering a baseline of sorts. Being able to say “I can’t do X, even with the stock charger” can go a long way. Without the stock charger, tech support could wonder if maybe your third-party charger is to blame for your issue. The other benefit of included chargers are when the device uses some weird charging technology or something that makes the included charger actually better for that device than the third-party one that I already have.