  In Newtonian mechanics, inertial pseudoforces - or fictitious forces - appear
in systems studied in non-Galilean reference frames; e.g., a centrifugal force
seems to arise if the dynamics is analyzed in a rotating reference frame. The
equivalent of Galilean invariance for relativistic kinematics is Poincar\'e
invariance; analogous artificial effects may arise in relativistic quantum
field theory (QFT) if a system is studied in a framework violating Poincar\'e
invariance. We highlight how such issues complicate the traditional canonical
quantization of QFTs and can lead to a subjective description of natural
phenomena. In fact, if the system involves the strong interaction, obtaining
objective results can become an intractable problem using canonical
quantization because the pseudoforces are essentially nonperturbative. In
contrast, the treatment of the same problem using light-front (LF) quantization
is free of spurious pseudoeffects because Poincar\'e invariance is manifest;
thus the treatment of strong interaction problems becomes simpler. These
statements are illustrated using several examples: the Gerasimov-Drell-Hearn
(GDH) relation, a fundamental feature of QFT; the absence of any measurable
impact of Lorentz contraction in high-energy collisions; and the fictitious
character of vacuum fluctuation contributions to the cosmological constant.
