Yes, I also am under the impression that spearpoints characteristically have very strong tips.
We're talking about spearpoints, not daggers. Daggers are usually very narrow and can be weaker at the tip if lateral stress is applied. Spearpoints are not as narrow, and are geared toward utility cutting, not thrusting.
That being said, spearpoints are my favorite shape for general utility. I carry a SAK every day (spearpoint). If I carry a larger, stronger knife, it's usually an Emerson CQC-10 (spearpoint). Of course, instead I sometimes carry a BM 710 or a Spyderco, or one of several slipjoints (usually a Queen toothpick), but even then some of my slipjoints have spearpoints (canoe patterns, for example).