. . . uhh, no – not so much.
I periodically run into this sort of lapse in judgment while doing inspections. This is a load-bearing roof beam on a mid-century modern home. Typically projecting out from the roof edge several inches, these beam-ends are prone to developing rot over time. Being the one part of the structure that is not protected by the roof, these beams are at the mercy of the hot summer sun, and winter rains. Along with the stresses of constant expansion and contraction throughout the seasons, the end grain, and naturally occurring cracks, suck up rainwater like a sponge. If the source of moisture is not completely eliminated (as in this case), it will continue to feed any fungus already in the beam. Restoration or replacement are the only choices here, not sheet metal.