No. Try to understand what the plant's actual anatomy is regarding plant parts and their functions and how plant hormones control all plant functions and processes. There are dormant buds that reside within the axis where the leaf petiole attaches to the "trunk". These are capable of output. If underground, they become roots, if above ground, leafsets with petioles.
Again, when you pinch out the growth above the 2nd true node, you induce a hormonal re-distribution to those 4 dormant buds. You have now created 4 new dominant leaders (which will become 4 main colas) regarding "apical dominance" instead of the usual one.
The fact that your stem may be weaker at some point is not a problem, that's just an issue of age regarding normal development. As the plant matures the stem (trunk) becomes stronger from the bottom up.
UB