Why ECC6 upgrade stuffed in so many support packages?

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Am I force to have all of this support package in my ECC6 upgrade?

Component SAP_BASIS Support Package 15 - 18

Component SAP_ABA Support Package 15 - 18

Component PI_BASIS Support Package 15 - 18

Component ST-PI Support Package 6

Component SAP_BW Support Package 17 - 20

Component SAP_AP Support Package 12 - 15

Component SAP_HR Support Package 23 - 42

Component SAP_APPL Support Package 12 - 15

Component EA-IPPE Support Package 12 - 15

Component EA-APPL Support Package 12 - 15

Component EA-DFPS Support Package 12 - 15

Component EA-HR Support Package 23 - 38

Component EA-FINSERV Support Package 12 - 15

Component FINBASIS Support Package 12 - 15

Component EA-PS Support Package 12 - 15

Component EA-RETAIL Support Package 12 - 15

Component EA-GLTRADE Support Package 12 - 15

Component IS-PS-CA Support Package 12 - 15

Component IS-OIL Support Package 12 - 15

Component IS-M Support Package 12 - 15

Component IS-H Support Package 13 - 17

Component IS-CWM Support Package 12 - 15

Component INSURANCE Support Package 12 - 15

Component FI-CAX Support Package 12 - 15

Component FI-CA Support Package 12 - 15

Component ERECRUIT Support Package 12 - 15

Component ECC-DIMP Support Package 12 - 15

Component IS-UT Support Package 12 - 15

Component SEM-BW Support Package 12 - 15

Component LSOFE Support Package 12 - 15

Is there a way to select which component not to include? at which step of the upgrade?