Don't agree with that statement at all.

An electric pump PUSHES gas to the motor instead of SUCKING it there, as do vacuum pumps on outboards (and pressure is far more effective; it works with 5 to 7 psi pressure verses only a half pound of suction). A small air leak before the pump, or an unexpected restriction, and fuel flow is reduced, causing a lean out. In fact, many an OB has been damaged when the owner installed a water separator/ filter before the fuel pump, which didn't have enough suction to pull gas through when it was contaminated.

Jeff

PS: Virtually every serious race car uses an electric fuel pump, with the smallest automotive unit large enough for most outboards.