Sealing with oil/butters

I have managed to dry out my hair, and I think I have used too much protein. So I was doing some research on getting more moisture into my hair. I was thinking about sealing with olive oil when I came across an article where ouidad was saying that oils and butters suffocate hair and therefore dry it out. Has anyone experienced their hair drying out from sealing with oil?
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3a, some 2c & 3b, medium texture, porosity normal, low elasticity :-(
washing/cowashing, conditioning, protein tx: curl junkie products
leave in:curl junkie conditioners and treatments as leave in
styling: curl junkie
sealants - jane carter nourish & shine
This is due to most people use oils either as a pre-poo to prevent hydration fatigue or as a sealer. If they are using it as the latter as rbb stated you use it once your hair has some moisture already in it, just like how you apply moisturiser to your skin after a shower/bath.
washing/cowashing, conditioning: devacurl decadence one condition, hair rules quench, as i am coconut cowash, curl junkie daily fix, curl rehab
leave in: curl junkie smoothing lotion, hawaiian silky 14 in 1, hair rules quench, as i am, camille rose fresh curl
styling: hair rules curly whip, camille rose curl maker
sealants: oil rinse with Africa's Best Herbal Oil, Soultanicals Knot Dressing, bekura palm tapioca or jane carter nourish & shine