Yes, but.......
The VFW
M1
rifles I was asked to fix worked fine in semi-auto (after cleaning), even with the weld. (Some had weld on the blank firing adaptor,too.) And, many of the 1903/1903A3 drill rifles that
CMP
sold had welds (barrel-to-receiver, & mag cutoff).
Many years ago drill rifles were selected from rifles that had become "unserviceable", & would be dangerous to fire with live ammo. The armory couldn't very well plug the chamber, or the rifle couldn't be used for blanks. The spot welds are a red flag to any armorer, "Don't try to restore this rifle."
In more recent years, perfectly good rifles have been converted to drill rifles because 1) they were obsolete, & 2) there were requests for drill rifles. We can only guess why the spot welding continued; maybe it was to discourage parts swapping.
The 1903A4 reproductions currently being sold by Gibbs are on drill rifle receivers. They claim that there was no damage from the heat of welding, & we have no reported problems with these rifles.