The experts could be wrong because they only consider the 5 year requirement. Unfortunately there is also the question of abandonment of LPR status.
"Essentially, a lawful permanent resident is someone who has the right to reside permanently in
the United States so long as her status does not change. A lawful permanent resident who makes
a temporary visit abroad is permitted to enter the United States as a “special immigrant.”
If the lawful permanent resident’s trip abroad was more than a “temporary absence,” USCIS, CBP, or
ICE can find that she abandoned her residence. If USCIS, CBP, or ICE makes such a finding,
then she can no longer be admitted to the United States as a “special immigrant,” which means
that her status has changed. This status change means that she was no longer lawfully admitted
for permanent residence under INA § 101(a)(20). Therefore, when she re-entered the United
States, she actually did so without a valid visa and was therefore inadmissible under INA
§ 212(a)(7)(A)(i)(I). Because this individual was inadmissible at the time of entry, she would be
removable under INA § 237(a)(1)(A).59"