The team that shoots better wins nearly 80% of the time in the NBA. The Wizards outshot the Philadelphia 76ers 64.1% to 55.4% (effective field goal percentage).
A team that makes four or more three-pointers than their opponent wins about 75% of the time in the NBA. The Wizards were +6.
Naturally, they lost anyway.
This time, the causes were offensive rebounding (-9) and free throws (-21 from the free throw line). To be clear, the free throw difference is not evidence of conspiracy or even poor officiating. The Sixers were feeding Joel Embiid, a force of nature for which the Wizards had no answers, and Washington has not a single player on the roster with the offensive chops to force fouls.