If your house gets robbed, just call the lictor's guild or use your scutum to fend off the attack.
No Roman citizen actually needs a gladius. If push came to shove, what, are you and your untrained barbarian slaves going to defeat 10 legions by yourselves?
What next, should you have the right to own a ballista? No Roman citizen should need anything more than a pugio to defend himself in his home. You're just overcompensating for your short stature and plebeian birth.
What do you need a gladius for, Romanfats?