Why are vEdas called podhu or common?

திருநாவுக்கரசர் தேவாரம் தலம் பொது திருக்குறுந்தொகை ஐந்தாம் திருமுறை திருச்சிற்றம்பலம் அருக்கன் பாதம் வணங்குவர் அந்தியில் அருக்கனாவான் அரனுரு அல்லனோ இருக்கு நான்மறை ஈசனையே தொழுங் கருத்தினை நினையார் கல் மனவரே. திருச்சிற்றம்பலம் thirunAvukkararcar thEvAram thalam pothu thirukkuRunthokai ainthAm thirumuRai thirucciRRambalam arukkan pAtham vaNaN^guvar an^thiyil arukkanAvAn aran uru allanO irukku n^AnmaRai IcanaiyE thozum karuththinai n^inaiyAr kal manavarE. thirucciRRambalam Meaning: People worship the feet of sun in the evening. Isn't sun form of hara ? Four vEdas (starting with) Rig worship only Ishvara. Those with stone like mind do not understand the concept. Notes: 1. People who do not understand the concept of God, worship various divines to be different and develop misconceptions. Due to the lack of understanding they even think that vEdas hail various divines like agni, indra... Those who realize know that these are nothing but the powers of the Supreme only. c.f. indram mitram varuNamagnimAhuratho divyaH sa suparNo gurutmAn | ekam sad viprAH bahudhA vadantyagnim yamam mAtarishvAnamAhuH || - Rig vEda. (For more http://www.shaivam.org/shpvediy.htm ) 2. For this reason (hailing God through Its multiple forms exposed) vEdas are known "podhu" (common) in hailing the Supreme concept and Agamas are called "ciRappu" (special) as the explicitly hail as Lord shiva. 3. arukkan - sun.