Holy Orders being reserved to men is an infallible teaching of the Church. If the Church were to ordain women anyway it would disprove the Church's indefectibility. It would expose the Catholic Church as but another man made sect.
The probable reasons why only men could become priests fall into three areas:
1.women were mostly not literate then.
2.priests sometimes had to travel to different villages, thus a female priest could be subject to potential rape.
3.Jewish society was VERY patriarchal.
Obviously, conditions have changed over the last 2000 years, thus certain teachings can and often
have changed with different conditions-- ask Galileo about that.
To take the Eucharist in a state of mortal sin is itself a mortal sin.
1 Corinthians 11:29
It is an act of charity to withhold the sacrament from someone known to be in an objective state of grave matter because to allow said persons to commit sacrilege only compounds their state of sin. Go to confession and then present yourself for communion.
Generally, in today's Catholicism we refer it as "serious sin", not "mortal sin".
Thus, maybe let God sort this out as Pope Francis basically has stated because we
all sin. Plus, we do confess our sins at mass during the liturgy prior to taking the Eucharist.
IOW, "Let he who is without sin cast the first stone."